Analisa Stabilitas Geoteknik Pergeseran Tanah Dan Penanganannya Studi Kasus: Jembatan Sta 53 Tol Serang-Panimbang, Provinsi Banten

Aryadi, Brillianta Cahya (2026) Analisa Stabilitas Geoteknik Pergeseran Tanah Dan Penanganannya Studi Kasus: Jembatan Sta 53 Tol Serang-Panimbang, Provinsi Banten. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pembangunan infrastruktur jalan tol merupakan pilar penting dalam mendukung pertumbuhan ekonomi dan peningkatan konektivitas wilayah di Indonesia. Namun, pelaksanaan proyek infrastruktur berskala besar sering kali menghadapi tantangan geoteknik yang kompleks, khususnya pada daerah dengan kondisi geologi bermasalah seperti keberadaan claystone dan tanah lapukan (weathered soil). Jalan Tol Serang–Panimbang sebagai Proyek Strategis Nasional (PSN) memiliki peran vital dalam meningkatkan aksesibilitas Provinsi Banten, namun pada lokasi Jembatan 2 STA 53 teridentifikasi indikasi pergerakan tanah yang mengancam stabilitas lereng dan keamanan struktur jembatan. Penelitian ini bertujuan untuk menganalisis penyebab dan mekanisme kelongsoran yang terjadi di STA 53 serta mengevaluasi alternatif penanganan lereng yang paling efisien dan aplikatif. Pendekatan penelitian dilakukan secara terintegrasi melalui analisis data penyelidikan geoteknik (bor log, uji SPT, dan data laboratorium), survei Electrical Resistivity Tomography (ERT), serta data instrumentasi inklinometer. Analisis numerik dilakukan menggunakan metode elemen hingga (Finite Element Method/FEM) dengan perangkat lunak Plaxis 2D. Parameter kuat geser tanah, khususnya pada lapisan weathered claystone, ditentukan melalui korelasi empiris dan dikalibrasi menggunakan analisis balik (back-analysis) untuk memperoleh kondisi faktor keamanan kritis. Hasil penelitian menunjukkan bahwa penyebab utama kelongsoran adalah keberadaan lapisan weathered claystone dengan kuat geser residual yang rendah dan sangat sensitif terhadap peningkatan kadar air, sebagaimana terkonfirmasi oleh hasil ERT dan pembacaan inklinometer. Evaluasi alternatif penanganan lereng menunjukkan bahwa metode bored pile dan soil nailing sama-sama efektif dalam meningkatkan stabilitas lereng dengan nilai SF masing masing sebesar 1,74 untuk perkuatan boredpile dan 1,70 untuk perkuatan soilnailing. Namun berdasarkan analisis teknis, keselamatan kerja, biaya konstruksi, dan konstruktabilitas, bored pile memberikan kinerja paling optimal terhadap kondisi longsoran pada STA 53. Penelitian ini diharapkan dapat menjadi referensi ilmiah dan praktis dalam penanganan longsoran pada lereng dengan kondisi tanah lapukan, khususnya pada proyek infrastruktur strategis di Indonesia.
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The development of toll road infrastructure is a crucial component in supporting economic growth and regional connectivity in Indonesia. However, large-scale infrastructure projects frequently encounter complex geotechnical challenges, particularly in areas underlain by problematic geological formations such as claystone and weathered soil. The Serang–Panimbang Toll Road, designated as a National Strategic Project, plays a vital role in enhancing accessibility in Banten Province. Nevertheless, significant ground movement has been identified at Bridge 2, STA 53, posing a serious threat to slope stability and structural safety. This study aims to investigate the causes and mechanisms of slope failure at STA 53 and to evaluate the most effective and applicable slope stabilization alternatives. An integrated research approach was employed, combining geotechnical investigation data (bore logs, SPT results, and laboratory tests), Electrical Resistivity Tomography (ERT) surveys, and inclinometer monitoring data. Numerical analyses were conducted using the Finite Element Method (FEM) implemented in Plaxis 2D. Soil shear strength parameters, particularly for the weathered claystone layer, were derived from empirical correlations and calibrated through back-analysis to reproduce critical failure conditions. The results of this study indicate that the primary cause of the landslide is the presence of a weathered claystone layer with low residual shear strength that is highly sensitive to increases in water content, as confirmed by Electrical Resistivity Tomography (ERT) results and inclinometer measurements. The evaluation of slope stabilization alternatives shows that both bored pile and soil nailing methods are effective in improving slope stability, with safety factors of 1.74 for bored pile reinforcement and 1.70 for soil nailing reinforcement. However, based on technical performance, occupational safety considerations, construction cost, and constructability, the bored pile method provides the most optimal performance for the landslide conditions at STA 53. This research is expected to serve as both a scientific and practical reference for landslide mitigation on slopes with weathered soil conditions, particularly in strategic infrastructure projects in Indonesia.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	stabilitas lereng, weathered soil, claystone, Jalan Tol Serang–Panimbang, metode elemen hingga, ERT, bored pile, soil nailing slope stability, weathered soil, claystone, Serang–Panimbang Toll Road, finite element method, ERT, bored pile, soil nailing
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA169.5 Failure analysis T Technology > TA Engineering (General). Civil engineering (General) > TA455.S6 Soil (Materials of engineering and construction) T Technology > TA Engineering (General). Civil engineering (General) > TA749 Soil stabilization
Divisions:	Faculty of Civil Engineering and Planning > Civil Engineering > 22101-(S2) Master Thesis
Depositing User:	Brillianta Cahya Aryadi
Date Deposited:	26 Jan 2026 09:05
Last Modified:	26 Jan 2026 09:05
URI:	http://repository.its.ac.id/id/eprint/130545

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